Damn, this looks sad. I've never had win8 or a dx11 GPU, but I've never encountered this problem neither with dx9 nor dx10 (above 8.1, according to the same logic). So not sure if I can help you. Let's hope some other members know of a way to cope with this problem

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Edit:

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Found a thread on this topic, but it's in Russian, and as it seems, still with no solution: